You need a way to verify your settings. Use 3DMark Time Spy , Unigine Heaven , or demanding games like Cyberpunk 2077 or Starfield .
If your system crashes or the driver resets during any of these phases, go back into Adrenalin and (e.g., from 1050 mV to 1060 mV). Repeat the testing until you achieve rock-solid stability. Expected Results and Thermal Impact
Increasing the power limit to +15% is recommended to ensure the card isn't artificially throttled while you are testing for voltage stability. 6800xt undervolt settings work
Run Time Spy Stress Test + 20 minutes of Cyberpunk’s built-in benchmark. If no crash, drop voltage by 10 mV and repeat. Stop at 1020 mV or first crash—then add back 15 mV for daily stability.
Only docking half a point because game-to-game stability can be finicky. But when tuned correctly, the RX 6800 XT transforms from a power-hungry beast into a cool, quiet, and faster-performing GPU. You need a way to verify your settings
Change the Tuning Control from "Automatic" to . Read and accept the warning prompt. Toggle on the following switches: GPU Tuning (Enable Advanced Control) VRAM Tuning (Enable Advanced Control) Power Tuning Step 3: Lower the Voltage
: Even with an undervolt, a high-quality 750W PSU is recommended for the 6800 XT to handle transient power spikes. Repeat the testing until you achieve rock-solid stability
Increasing this allows the card to breathe even with lower voltage. Enabled Located in VRAM tuning; provides a "free" performance bump. Step-by-Step Optimization Process